Catalysis inside the Hexameric Resorcinarene Capsule

Accounts of Chemical Research
Qi ZhangKonrad Tiefenbacher

Abstract

In this Account, we outline our investigation into the supramolecular resorcinarene capsule as a catalyst. Molecular capsules not only are of interest due to the similarities of their binding pockets with those of natural enzymes but also feature potential advantages for catalysis. Due to the restricted internal volume of the binding pockets, substrate selectivities are commonly observed. Substrates that are encapsulated more efficiently will be converted selectively in the presence of less suitable substrates. This size selectivity cannot be obtained in a regular solution experiment. In addition, because of the distinct chemical environment inside the capsule, different product selectivities may be observed. Furthermore, the encapsulation of reactive catalysts inside confined environments may improve catalyst compatibility for multicatalyst tandem reactions. Although the potential advantages of performing catalysis inside closed microenvironments are generally recognized, the number of known catalytically active supramolecular host systems is still very limited. There are several reasons, the most important of which is that it is very difficult to predict the catalytic potential of known supramolecular host systems. In several...Continue Reading

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